Typewriting machine



A. e. F. KuRowsKn l TYPEWRITING MACHINE. l. y APPLICAIION FILED JAN 28| 1921 1,428,851 ,v PatentedSept. 12, 1922..

' 3 SHEETS-SHEET i #amey l A. s. F. Klmowskl. TYPEWRITING MACHINE. APPLICATION FILED M II. 2B. |9211 Pawnasept. 12,1922.

J3 SHEETS-SHEET 2.

.M La

"j W-I- I I N flwj.-

A. G. F. KUROWSKI.

TYPEWRITING MACHINE. nPFucATxoN FILED JAN. 2a, 1921.

wh W7 l, f. wn xx 4m 23m n m .WW um f u www MM a, x ma N Q ,m um

Patented Sept. l2, i922.

UNITED srA TES frATENTI .oi-Fica ALFRED G. r. KUNOWSK'I, or BROOKLYN, NEW YORK, AssreNoR To UNDiiRwoon` f 'rYrnwBr'rEitfooi/irANY, or NnwYONK, N,Y., A CORPORATION or DELAWARE.

i ToeZZ whom tina/y c siii, a citizen of the in Brooklyn Borough, iin the county of 5 Kings, city` and State Vof New York, have in- 'TYPEWRITING MACHINE. Application mea January 2s, 19,21. Asemi N. 440,66.

Figure 5-is perspective detaillof a por- Be it known that I, ALFRED G. F. Kunowtion of thebracket for` supporting and guid-V 50 United States, residing@,ingy thearms vwhich form' ,the pivotal connections forthe key-levers. f

Figure 6 isa perspective vi ew of a portionv vented certain new land useful Improvelof a key-lever,` v`showing an `arm slidably atments in Typewriting Machines, of which vllfwlled'01161'600- the following 4is a specication. f

chines, and particularly to the'- key-'action adjustment.y

thereof, an object being to provide 'means for readily changing thefdegree of pressure neothe type to print.

-A feature Of the provision 4of means whereby the leverage of the system of: levers tion may be varied, to thereby vary the pressure on the keys, and, preferably, this change of leverage .is eifecte that the pivotal point of the arms, which is kconnection between key-levers. In this or softer, according erative.

* Figure 7 is aview similar to Figure 4, but r This inventionrelates totypewriting mashowing, the parts in a Ydifferent position of Referringl to Figuregl', 'theframe ofthe vtypewriter isshown at l, and `this frame is y essary to be exerted upon the keys to drive .modified byhaving its rear portion slightly n y deeper than usual, in order tol accommodate invention residesl in the some .of the mechanism used in connection withiny improvements; yAsusuahthe.typencludedn thetype-acbars 2 areadapted to swingabouta fixed 65 pivot 3,.saidtypekbars having-the usual vdriver 4,-connected thereto, at5, said driver d in connection 'with the beingfpivoted at 6 ina fixed support 7 The driver l is inthe form of abell-crank, the.; right-hand portion, .as seen in Figure '1,70 y being forked as shown, to v'embrace a pin 8, ried by a bracket which may be adjusted-,so carried by a`ley-lever:9,jsaid key-lever hav-v fing the usual key 10,;connected thereto, :by also the pivotal point `of. the key-levers,` may which said key-lever may berockedaand the V.beadjusted to or fromy the poi-nt ofpivotal` typefbar driven to cause :eitherofthe type 75 the type-barsand thev 11,;,oarrie'd thereoii,11tov strike against'fthe Way, vthe pressure necesy platen 12. Thev platen112is supported, as. sary to drive the typemay be made harder vrusual, in afcarriagewhich slides upona to the desire of the op- ;-rearrod:f14,1andis also supported, nearyits-' f 'central portion,:on amovablerod 15,said 80 Other featuresr andfadvan-tages'will lherefcarriage havingV a Aroller 16,5which engages inafter appear.

In the accompany means for shifting the position of some of the parts, with .a key f in normal position,

linesythe Ychanged position foffsome of the ted-line position. y

ing drawings,

the fulcra. thereof.` v

"said rod 15.@This rod,as.isusual in mal --chines of `the Underwood construction, yis Figure l4 is aside elevation. of an Underadapted tolbe rocked to4 shift yfromlower to upperoase,f-andlsaid roekingis effected by a rocking member 17j, pivotedmt 18; The, carriage isl fed,.in` letter-spacing, bythe usual escapement which includes al :dogtions from two keylevers, showing the A rocker, indicated as awhole by thenumeral 19, said dog-rocker acting to move fixed and. 9o Figure 4L is an elevational view, showing movable escapementdogs i into/and ,out of yengagement. withw'the Afusualy -escapenientand showing, in dotted wheel 20,1having yconnected thereto antes@ capement-piiiion 21,'with-which engages a partswhenthe rkey is depressed to the dotrack-22,.carried"by the 'typewriter-carriage,,H95 Iv fthe carriage itselfbeingdrawnftowardsthe Vleft by the usual carriage-spring (not s carried by they frame ofthe typewriter. Each f drive the type to printing position, and, Ain,

the particular' embodiment of the invention shown, this is accomplished by varying the f leverage oflever-system` between the key and the type. Preferably, each oi the key-levers is lengthened, and, instead .of the ylever having a Xed pivot, I provide arms 23, each of which has a' bent-up portion24, having a hole 27"L theretlnough,A said` armv alsohaving a lug 25,- which is bent over to loosely engagethe edges of a key-lever, *asf shown particularly in Figure'.,` The arms 23 for all `of the key-levers are' pivotally mounted in a lbracket 26, andare' held in place by a fulcrum-rod 27 extending f through theuholes 27% Each arm vis sup plied with an independent tension-springy 28, havingfa screw29, by which itmay be adjusted in a manner well known in the fart, this screwV 29vbeing threaded into a hole lin the bottom of the bracket 26,." rFor conven-V y ie'nce in manufacture, tlie bracket' 26 consists of 'acasting having a base portion'l 30 and upstanding side portions 31;. #The portion supporting fthe fulcrum'uod, 27 is-made :in a separate piecev 32 `and is slotted, as

shown infFigures 3 and 5 -to properly guide the arms.` In order to properly guide the ends'of the key-levers, a guiding'rod 33 passes-through a slotin the ends thereof, "said slotgbeing of such length as topermit full movement ofthe leverat all times. The

'arms 23 form y'the points aboutV which the keylevers pivot,"and the vbracket 26,v which oarrlesthese arms, 1s movabletransversely of the machine by means of' screws 34, "one onl either side ofthe machine, said screws passing throughth'readed holes 35, .formed in lthe sidesl of the bracket 26, 'said screws being supported atthe-ir ends inbrackets screw has atits left-hand end, as shown nin Figure. 3, a. Spiralgear 36,7each of which" is-in mesh with another spiral gear 37, car-kV ried by a` shaft 38, one end of which pro-v `jects through the casing andhasa knob-139,k

secured thereto, byv which the'sha'ft may be rotatedA and the bracket. 26` adjusted.

If Athe bracket- 26 is positioned, indi `cated in .Figure4, the force'necessary tode-.`4 press a key 10 will be less than that'required" to depress saidrkeyifthe yparts were ad-` justedas indicated in Figure 7, because, in-

Figurepf?, the distance between the pivotal`r point' 27 ,of the .key-lever' and the: .pivotalA point 6 of 'the typefdriverl isV greater `than the! distance; between the same', pointsin Figure 4, While the distance between the point 6 and the key 10 remains the same. It

ally .supporting all of said arms, said'` .will be noted, however, that, by reason the fact that the spring 28 is carried by vthe bracket, to be movedl along the key-lever 9 concomitantly with t-he movement ot the pivot 27, it always exerts its pressure to return the key-lever to normall position at `a constant distance from, its pivotal point.

`bar and the case-shift'have been modiiied somewhat, iinorder to avoid any interference of parts. Thus, the space-bar 40 hasy an upstanding arm 41 connected thereto, bar pivoting at 42, andto its arm 41 is con-V nected'a'link 43, which has a portion. 44 for lengagement withy the escapement-rocker. Also, the shift-key 45'is bent' up, so as to avoidinte'rferen'ce with other parts, as .is likewise *theV case-shift detaining Vlever 46, said leverrbeing pivotedv at 47 land being moved to release the case-shiftv by the usual latch 48, operated'on by` a pin 49, carried by theshift-keylever. l y f u Variations maybe resortedto vwithin the -scope of the invention, and portions of the improvements `may be' used without others.. v vHaving thus described my invention,.I claim: l" .Y 1. YIn a typewriting machine, the eombination with agkey-lever, of an arm fslidably `mounted on said lever, a bracket pivotally supporting said arm, and means for adjusting said bracket. d v I 2. In a typewriting-machine, the combi-V nation with keyfleve'rs, oiian'arm slidablyv mounted on each key.lever,'a bracketvpivotbracket'having threaded holes at either lendl thereof, and screws,` engaging saidhOleS, vtov`v` thereby adjust v4said bracket.

In a typewritingmachine, the

combi--` nation with key-levers, of anv arm slidably 110 mounted on veach key-lever, a bracket pivotallysupporting all of said arms,zsaid bracket having threaded holes at either end y thereof, screws engaging said holes, and

means for .turning bothy screws simul- 11'5,"

taneously, to'` thereby adjust said bracket.A y

4. In a typewritinn machine, in co1nbina J tion, a pivoted keyever, a spring for re# turning ysaid lever, said spring engaging the same at a constant pivot, a type-bar, pivotal connections fromv "said type-bar to said key-lever, and means .forconconntantly moving both saidsprin'g and the pivot of said .keyflever nearer ,toy or farther. from, the point of connection .be-` 125 ,tween the 'same and the type-bar connections-.-

5. In a typewriting machine,.thecombis` nation with a key-lever formed da;y single piece, of a pivotally-mounted arm slidable on said key-lever, the pivot of saidarm act- 180,;

distance from vits ing as a, bearing about which said k ey-, pivots, means for shifting the position of level` pivots, and means for shiftingv the the pivot of said arm, and guiding means 10 postlon of the pvot of sail? arm. b .for the end of said key-lever.

6. 'n a typewrtng mac ine the com i- 5 nation with a key-lever formed of a sin 1e ALFRED G' FVKUROWSKI' piece, of a pvotally-mounted arm slda 1e Witnesses:

on said key-lever, the pvot of said arm act- CATHERINE A. NEWELL,

ing as a, bearing about which said key-lever JENNIE P. THORNE. 

